APA

Hill D. A., . (2013). Life. Upper Intermediate. B2. Andover: Cengage Learning.

Chicago

Hill D A, . 2013. Life. Upper Intermediate. B2. Andover: Cengage Learning.

Harvard

Hill D. A., . (2013). Life. Upper Intermediate. B2. Andover: Cengage Learning.

MLA

Hill D A, . Life. Upper Intermediate. B2. Andover: Cengage Learning. 2013.